Best answer

In the first line you’re writing the value of that merge code to var value.

In the second line you will have an if statement that checks to see if there is no value (undefined or null), and if there isn’t a value return false to break the function

If the condition does not pass (there is a value), instead carry on with the rest of the function (! acts as a negation in Javascript). The `if (value)` checks to see if there is a value, `if (!value)` checks to see if there isn’t a value.